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RE: [Xen-devel] Looking for xen-blkback patch for 2.6.39 kernel

To: Iain Kay <spam@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-devel] Looking for xen-blkback patch for 2.6.39 kernel
From: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>
Date: Fri, 3 Jun 2011 12:46:44 -0700 (PDT)
Cc: Konrad Wilk <konrad.wilk@xxxxxxxxxx>
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> From: Iain Kay [mailto:spam@xxxxxxxxxxx]
> Sent: Friday, June 03, 2011 11:51 AM
> To: xen-devel@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-devel] Looking for xen-blkback patch for 2.6.39
> kernel
> On 3 Jun 2011, at 16:46, Konrad Rzeszutek Wilk wrote:
> > Or you can just get the 2.6.39 stable tree that has those patches and
> some more from
> >
> > stable/2.6.39.x
> >
> I have attempted to compile this stable/2.6.39.x branch however running
> into difficulties. The error I receive during make is:
>  MODPOST vmlinux.o
>  GEN     .version
>  CHK     include/generated/compile.h
>  UPD     include/generated/compile.h
>  CC      init/version.o
>  LD      init/built-in.o
>  LD      .tmp_vmlinux1
> mm/built-in.o: In function `enable_swap_info':
> /usr/local/src/stable/2.6.39.x/mm/swapfile.c:1566: undefined reference
> to `frontswap_init'
> make: *** [.tmp_vmlinux1] Error 1

Sorry, that's my bug.  I pointed Konrad to a git tree
which included frontswap but it was accidentally a stale
tree.  There is another commit to fix it but I don't
think Konrad has had a chance to pull the fix yet
into his tree.

A quick workaround is to enable CONFIG_FRONTSWAP.... it
doesn't do anything without being enabled at runtime so
will have no effect unless you know how to enable it.

Or you can manully pull this commit from my tree:


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